5.1 SYSTEM DIAGNOSIS
5.1.1 Compressor Start Relay (CSR) Testing
Procedure:
1. Make sure that the refrigerator is switched off and is not plugged in.
2. Remove the lock panel of the refrigerator.
3. Locate the compressor’s pins (typically located on the lower side of the compressor).
4. Keep on track of the resistance values:
a. Connect the tester’s pins to the terminal to see how the current changes
throughout the process.
b. Take note of the resistance readings the component that provide each reading.
Table 1: Compressor Start Relay
Table 2: Leak Testing
Table 3: Charging Refrigerant
Table 4: Cleaning by self-vacuuming
Table 5: Overall Result
5. Identify each Terminal
6. Check if the compressor has a ground fault.
5.1.2
Leak Testing
Procedure:
1. Be mindful of what the color-coded hoses of the auxiliary manifold gauge represent.
Yellow hose for the middle auxiliary port.
Red hose for the red gauge.
Blue hose for the blue gauge.
2. Next, attach the hoses to their respective connection.
Yellow hose to the canister.
Red hose to the discharge line.
Blue hose to the suction line.
3. Put soap on the water in the container. Let suds form in the sponge.
3. Perform a Leak Test
a. Open the refrigerant tank that will allow the vapor to flow.
b. Apply the soap suds prepared earlier to the auxiliary port and fittiing on the yellow
hose.
c. With the use of a mirror and flashlight, observe if bubbles are forming, this is an
indication of a leak on the hose.
Note:
Be mindful of where the low and high pressure are. Avoid applying soap suds to the
low-pressure side to avoid suction of the soap into the system. This can damage the
system.
4. Repeat the process, this time, test the red hose.
VI. RESULTS AND DISCUSSION
6.1 SYSTEM DIAGNOSIS
6.1.1 COMPRESSOR START RELAY
TRIAL/S
1
2
COMPRESSOR START RELAY
AMPERE
LOW PRESSURE
(Blue Side)
0.887 A
7.37 psi
0.825 A
7.37 psi
Table 1: Compressor Start Relay
HIGH PRESSURE
(Red Side)
100 psi
115 psi
DISCUSSION:
6.2.1 LEAK TESTING
TRIAL/S
3
LEAK TESTING
AMPERE
LOW PRESSURE
(Blue Side)
0.898 A
0
Table 2: Leak Testing
HIGH PRESSURE
(Red Side)
150 psi
DISCUSSION:
Since there is no bubbles form while the soap suds are applied to the auxiliary ports and fittings,
the is no leakage.